The Keston C35 combi boiler delivers reliable heating and hot water for medium-sized homes, with an impressive 89.6% efficiency rating that'll help manage your energy bills. You'll get a solid 35kW output that can handle up to 20-25 radiators and 2 bathrooms comfortably. While the £1,980-£2,480 installed price tag might seem steep, the 7-year warranty and flexible twin flue system make it worth considering. There's quite a bit more to discover about this compact powerhouse.
Key Takeaways
- The Keston C35 Combi Boiler costs between £1,980-£2,480 installed, with supply-only pricing starting at £1,180.
- Features 35kW output suitable for homes with up to 20-25 radiators and achieves an impressive 89.6% efficiency rating.
- Comes with a 7-year warranty including free parts and labour for the first 5 years.
- Twin flue system provides installation flexibility up to 27 metres, making it adaptable for various home configurations.
- Delivers hot water at 14.5 l/min and handles 2 bathrooms comfortably, though may struggle with larger household demands.
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Keston C35 Combi Boiler Overview
The Keston C35 combi boiler packs impressive performance into a compact frame, making it an excellent choice for small to medium-sized homes.
With its 35kW output and ability to handle up to 10 radiators, you'll have plenty of power for both heating and hot water needs.
You'll appreciate the user-friendly features, including a large backlit display and straightforward controls that won't leave you scratching your head.
The boiler's efficient 89.6% rating means you're not wasting energy (or money) while keeping your home cosy.
Installation is a breeze thanks to the wall-mounted design and pre-fitted filling loop.
Plus, with twin flue capability extending up to 27m, you've got flexibility when it comes to placement.
The 7-year warranty adds peace of mind to this already reliable package.
Keston C35 Combi Boiler Performance and Efficiency
Power-packed performance defines Keston's C35 combi boiler, delivering an impressive 35kW output for hot water and 25.6kW for central heating. You'll have plenty of heating muscle to keep your home cosy, with enough capacity to handle 20-25 radiators and 2 bathrooms comfortably.
| Feature | Performance |
|---|---|
| Hot Water Flow | 14.5 l/min |
| Heating Efficiency | 88.9% SAP rating |
| Energy Rating | ErP A-rated |
The C35's efficiency ratings will help keep your energy bills in check. With its fully modulating operation and built-in weather compensator, you're getting smart performance that adjusts to your needs. Think of it as having a clever heating system that knows exactly how much power to use – no more, no less. It's like having a smart thermostat that's built right into your boiler. Our collection of Keston boiler articles provides additional insights into the manufacturer's complete product range.
Keston C35 Combi Boiler Pros and Cons
When evaluating the Keston C35 combi boiler, you'll want to weigh three key advantages against its potential drawbacks.
Its compact design means you can tuck it neatly into a standard kitchen cupboard, while the innovative twin flue system gives you incredible flexibility for installation – up to 27 metres!
The boiler's impressive 89.6% efficiency rating and included weather compensator will help keep your energy bills in check.
However, there are some limitations to take into account:
- May struggle to meet hot water demands in larger households
- Depends on good mains pressure for peak performance
- Higher upfront cost compared to similar models
For small to medium-sized homes with up to 20-25 radiators and 2 bathrooms, you'll find the C35's benefits typically outweigh its drawbacks.
Just remember, you'll need a Gas Safe registered engineer for installation.
How Does The Keston C35 Combi Boiler Compare To Similar Models From Other Manufacturers?
Looking beyond the Keston C35's individual features, it's helpful to see how this boiler stacks up against its main competitors in the 35kW category.
At 89.6% efficiency, the C35 falls slightly behind rivals like the Worcester Bosch 8000 Style, Viessmann Vitodens 100-W, and Vaillant ecoTEC Plus, which all achieve 94% efficiency.
The warranty coverage of 7 years, while decent, doesn't quite match the longer terms offered by competitors – up to 12 years for Worcester Bosch and Ideal Logic Max.
Price-wise, you'll find the C35 sits in the middle range at £1,180. It's more affordable than the premium Worcester Bosch 8000 Style but costs slightly more than the Ideal Logic Max.
The C35's standout twin flue system offers unique installation flexibility, though it's from a less established brand in the UK market.
How Much Does A Keston C35 Combi Boiler Cost?
Understanding the total cost of a Keston C35 combi boiler means breaking down both the unit price and installation expenses.
You'll find the supply-only price typically starts at £1,180, though you can expect to pay around £1,573.19 including VAT for the unit itself.
When it comes to installation, you'll need to budget between £500-£1,000 for labour, plus about £300 for essential extras like filters and flues.
The total package usually lands between £1,980-£2,480.
- Base unit price can vary between retailers, with some offering it for £1,472.60 including VAT
- Installation costs might increase if you need extensive pipework changes
- Additional expenses may include LPG conversion kits or extended warranty options
Keston C35 Combi Boiler Warranty and Service Support
The Keston C35 combi boiler comes with a robust 7-year standard warranty that you'll want to take full advantage of.
You'll get free parts and labour repairs for the first 5 years, with an extension to 7 years when you install it with a Keston System Filter.
To keep your warranty valid, you'll need to take care of a few simple things.
Make sure you register your boiler within 30 days of installation and schedule annual services with a Gas Safe registered engineer.
Don't forget to keep your 'Benchmark' commissioning sheet handy!
Need support? Keston's customer service team is ready to help through their dedicated hotline.
They're available weekdays from 8am-6pm, Saturdays 8am-4pm, and Sunday mornings until noon.
Plus, you can easily book services online through their website.
Final Verdict
After a thorough evaluation, Keston's C35 combi boiler stands out as a solid investment for medium to large homes.
With its impressive 89.6% efficiency rating and compact design that'll fit snugly in your kitchen cupboard, you're getting excellent performance without sacrificing space.
The included 7-year warranty offers peace of mind, while the weather compensator helps keep your energy bills in check. At £1,980-£2,480 installed, it's competitively priced for its class.
Key highlights that make this boiler worth considering:
- Perfect sizing for homes with up to 25 radiators and 2 bathrooms
- Twin flue system offering exceptional installation flexibility
- User-friendly features like the backlit display and pre-fitted filling loop
While it's not the cheapest option on the market, you're getting reliable heating technology that'll serve your home well for years to come.
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